Several years ago, I released an Eclipse plugin called Hasher. Hasher’s goal is to output values of common hash algorithms (MD5, SHA-1, SHA-256, SHA-384, and SHA-512 right now) of files selected in Eclipse. Hasher had fallen by the wayside and last worked under early version of Eclipse 3. I recently had a need for it for a personal project and decided to update it. Turns out, quite a bit has changed. Most notably, Eclipse actions are now deprecated in favor of Eclipse commands. Code using commands is much cleaner, but it’s quite a bit different, so I essentially had to rewrite the entire plugin. Also, I had some dependency issues that plagued me for far too long, but thanks to Stack Overflow, I was finally able to get things straightened out.

Hasher is now live on GitHub (, freshly tagged with v1.2. One of the things I learned during this rewrite is that there’s a lack of good examples and documentation out there for modern Eclipse plugins. I’m hopeful that Hasher can be useful to someone wanting to get into writing Eclipse plugins. Hasher is pretty simple right now, but it’s non-trivial (has external dependencies, interacts meaningfully with Eclipse – more than just Hello World). If you find yourself using it to learn, please let me know!

There’s still a to do list. I want to make the output prettier using a custom view. A tree view or a table view (or perhaps some hybrid) would probably be ideal. I don’t know how to do a custom view yet, though, so that’ll add to the learning process. Also, I want to make use of Eclipse’s Jobs API. Right now, I’m just manually creating a new thread to do computations. This works and leaves the UI free to do its work, but it’s not elegant and doesn’t take advantage of several nice features Eclipse offers for background jobs.

If you use Hasher, let me know what you think!